Average- MCQ Questions and Answers

Read- Average: Basic Concepts, Formulas

11. Out of 24 girls, 6 are 1 m 15 cm in height, 8 are 1 m 5 cm and the rest are 1 m 11 cm. What is the average height of the girls?

(a) 1 m 10 cm

(b) 1 m 15 cm

(c) 1 m 20 cm

(d) None of these

12. The average attendance of a college for the first three days of a week is 325, and for first four days it is 320. How many were present on the 4th day?

(a) 300

(b) 315

(c) 350

(d) 305

13. The mean temperature from the 9th to the 16th of January, both days inclusive, was 11.6 degree Celsius and from the 10th to the 17th was 12.2 degree Celsius. The temperature on the 9th was 10.8 degree Celsius. What was it on the 17th day ?

(a) 156 °C

(b) 16.6 °C

(c) 11.6 °C

(d) None of these

14. Five men agree with a sixth man to subscribe a sum of money for a chit fund. The first five are to be subscribed Rs 15 each and the sixth Rs 5 less than the average of all the six. The sixth man subscribed?

(a) Rs 9

(b) Rs 10

(c) Rs 9.50

(d) Rs 10.50

15. The average age of 30 boys in a class is 15.2 years. If 15 more boys join the class, the average of the whole class is reduced by half a year. The average age of the newcomers are?

(a) 13 years

(b) 13.7 years

(c) 12.3 years

(d) 12.7 years